Valve-grinding device.



R. N. STRINE.

VALVE GRINDING DEVICE.

APPLICATION FILED OCT. H. 1914.

LM6,U3% Patenfed July 13, 1915.

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ROY N. STBINE, OF WESTMINSTER, MARYLAND.

VALVE-GRINDING DEVICE.

Specification of Letters Patent.

Patented July 13, 1915.

Application filed October 17, 1591 1. -Seria1No. 867,166.

To all 1071 am it may concern Be it known that I, ROY N. STRIKE, a citizen of the United States of America, residing at Westminster, in the county of Carroll and State of Maryland, have invented new and useful Improvements in Valve-Grinding Devices, of which the following is a specification.

This invention relates to improvements in valve grinding devices and has particular application to a. hand operated device for regrinding the valves of hydrocarbon engines.

In carrying out the present invention, it is my purpose to improve and simplify the general construction of valve grinding devices and to provide a device whereby the valve to be ground will be oscillated on its seat so that the carbon and other matter on the valve seat and the seat engaging portion of the valve disk will be removed.

It is also my purpose to provide a device of the class described whereby the valve disk may be oscillated rapidly and conveniently and wherein the component parts will be so arranged and correlated as to reduce the possibility of derangement to a minimum.

A further object of my invention is to provide a valve grinding device wherein the tool carrying shaft may be adjusted longitudi nally so that the tool end of such shaft may be moved into engagement with the valve disk while the frame of the device is seated upon or engaged with the engine cylinder.

With the above the invention consists in the construction, combination. and arrangement of parts hereinafter set forth in and falling within the scope of the claim. 7

In the accompanying drawing; Figure 1 is a view in side elevation of a valve grinding device constructed in accordance with the present invention. Fig. 2 is a sectional view on the line 2-2 of Fig. 1. Fig. 3 is a sectional view on the line 33 of Fig. 1

' taken at right angles to Fig. 2.

Referring now to the drawing in detail, 1 designates a supporting frame composed of longitudinal side bars 2 and end pieces 3, 3 and formed on one of the end pieces 3 and projecting. outwardly therefrom are feet 4 adapted to engage the cylinder wall of the engine. Formed in the end walls of the casing are axially alining openings through which is passed a shaft- 5 capable of longitudinal movement and formed with a key and other objects in view,

way 6 extending through the length thereof. The side bars 2 of the supporting frame carry a Web 7 formed centrally with a hearing alining with the openings in the end plates of the frame and through which the shaft 5 extends.

In the present instance, one of the longitudinal side bars of the frame 2 is relatively thick and is formed with a longitudinally extending cavity 8 and a second longitudinally extending cavity 9 and journaled in one wall of the cavity 8 and projecting into the casing isa stub shaft 10 upon the inner end of which is fixed a bevel pinion 11 meshing with a simliar pinion 12 surrounding the shaft 5 and secured thereto through the medium of a feather engaging the key way 6 and a key Way in the pinion. The inner end of the stub shaft 10, that is, the end within the cavity 8, is provided with a crank arm 13 and connected with the crank arm 13 is one end of a pitman 14: having the remain ing end thereof connected with a crank disk 15 keyed to one end of a stub shaft 16 journaled in the wall between the cavities 8 and 9. Upon the inner end of the stub shaft 16, that is, the end within the cavity 9, is a spur pinion 17 and meshing with the spur pinion 17 is a spur gear 18 fastened upon one end of a drive shaft 19 journaled in the outer wall of the cavity 9 and provided Witha crank handle 20. The end of the shaft 5 between the legs 4 is equipped with a chuck 21 designed to receive a valve engaging tool 22 and surrounding the shaft 5 between the end plate carrying the legs 4 and the spider 7 is an adjustable collar 23 capable of longitudinal movement along the shaft and adaptid to be held in the desired adjusted position 3 shaft 5 between the collar 23 and the spider 7 is a coiled expansion spring 2 1.

In practice, the legs l are engaged with the cylinder or other part of the engine and the set screw carried by the collar. 23 loosened. The shaft 5 is now moved longitudinally within its bearings so that the tool 22 carried by the chuck 21 is brought into engagement with the disk of the valve to be ground. l/Vhen the shaft has been moved the required distance the set screw is tightened up and the spring 24 acts to hold the tool 22 in engagement with the valve disk. The shaft 19 is now rotated in one direction under the action of the handle 20 and its reciprocating motion imparted to the pitman 1 1 through means of a set screw. Encircling the' the medium of the spur gear 18, spur pinion 17 and crank disk 15, thereby rocking the arm 13, shaft 10 and bevel pinion 11, with the effect to oscillate the shaft 5 whereby an oscillatory motion is imparted to the valve being ground.

I claim:

In a valve grinder, a supporting frame composed of longitudinal side bars and and pieces interconnecting said side bars at the extremities thereof, one of said side ha rs being relatively thick and formed With longitudinal extending cavities parallel With each other, a shaft journaled in the end pieces of said frame and capable of longi- 5 tudinal movement therein, a valve engaging tool carried by one end of said shaft, means for holding said shaft in adjusted position, means located in one of said cavities and connected to said shaft for rocking the lat- 2 ter, and means located in the other cavity for actuating said rocking means.

In testimony whereof I afiiX my signature in presence of two witnesses.

ROY N. STRINE. Witnesses:

FRANK R. CASSELL, DnNTon Geno. 

